Bug 1861975 (CVE-2020-16094) - CVE-2020-16094 claws-mail: malicious IMAP server can trigger stack consumption
Summary: CVE-2020-16094 claws-mail: malicious IMAP server can trigger stack consumption
Keywords:
Status: CLOSED UPSTREAM
Alias: CVE-2020-16094
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1861976
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-07-30 05:12 UTC by Dhananjay Arunesh
Modified: 2020-07-31 13:44 UTC (History)
2 users (show)

Fixed In Version:
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Last Closed: 2020-07-30 07:27:50 UTC
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Description Dhananjay Arunesh 2020-07-30 05:12:00 UTC 
In imap_scan_tree_recursive in Claws Mail through 3.17.6, a malicious IMAP server can trigger stack consumption because of unlimited recursion into subdirectories during a rebuild of the folder tree.

References:
https://www.thewildbeast.co.uk/claws-mail/bugzilla/show_bug.cgi?id=4313
Comment 1 Dhananjay Arunesh 2020-07-30 05:12:29 UTC 
Created claws-mail tracking bugs for this issue:

Affects: fedora-all [bug 1861976]
Comment 2 Product Security DevOps Team 2020-07-30 07:27:50 UTC 
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.
Comment 3 Michael Schwendt 2020-07-31 13:44:43 UTC 
Seems this was reported to upstream in February without a response, and referring to a "malicious IMAP server" makes it mostly something of academical interest only. There are other corner-cases left that can crash Claws Mail.
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